Groundwater level monitoring device and construction method thereof

Abstract

The present invention belongs to the technical field of groundwater level monitoring, and discloses a groundwater level monitoring device and a construction method thereof. The groundwater level monitoring device includes an expansion body, an air pump, and a water level gauge. The expansion body can be placed in a monitoring hole on the soil to be measured. The air pump can inflate the expansion body so that the outer wall of the expansion body after expansion is sealed and fits with the inner wall of the monitoring hole. After the expansion body is expanded, a monitoring channel is formed along the depth direction of the monitoring hole, and the monitoring channel is connected to the bottom of the monitoring hole; the water level gauge can be extended into the monitoring channel to detect the water level in the monitoring hole. The expansion body is relatively small before inflation and can be placed in the monitoring hole very easily. After inflation, the expansion body expands and gradually squeezes tightly with the soil around the monitoring hole to achieve a sealing and fitting effect, effectively preventing hydraulic connection between different aquifers, thereby improving the accuracy of water level monitoring results.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater level monitoring, and in particular to a groundwater level monitoring device and a construction method thereof. Background Art

[0002] Groundwater is a vital component of water resources, and groundwater level is the most important and widely used monitoring factor. Groundwater poses a significant threat to foundation pit projects, with seepage, piping, and other hazards seriously impacting the stability of the pit and the safety of the surrounding environment. Groundwater level monitoring is not only used in construction engineering but also in fields such as environmental geology. Therefore, to minimize the harmful effects of groundwater levels and ensure project safety and quality, groundwater level monitoring is essential.

[0003] Currently, the pipes commonly used in groundwater level monitoring devices are PVC pipes or steel pipes with relatively high rigidity. It is difficult for the pipe wall to be in close contact with the soil, which easily causes hydraulic connection between different aquifers and leads to inaccurate monitoring results.

[0004] Therefore, there is an urgent need for a groundwater level monitoring device and a construction method thereof to solve the above problems. Summary of the Invention

[0005] One object of the present invention is to provide a groundwater level monitoring device that can prevent hydraulic connection between different underground aquifers, thereby making the groundwater level monitoring data more accurate.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A groundwater level monitoring device, comprising:

[0008] An expansion body and an air pump, wherein the expansion body can be placed in a monitoring hole on the soil to be measured, and the air pump can inflate the expansion body so that the outer wall of the expansion body after expansion is sealed and fits with the inner wall of the monitoring hole, and after the expansion body is expanded, a monitoring channel is formed along the depth direction of the monitoring hole, and the monitoring channel is connected to the bottom of the monitoring hole;

[0009] The water level meter is configured to be able to extend into the monitoring channel to detect the water level in the monitoring hole.

[0010] As an optional solution of the above-mentioned groundwater level monitoring device, the gas in the expansion body can be released to cause the expansion body to shrink and separate from the inner wall of the monitoring hole.

[0011] As an optional solution of the above-mentioned groundwater level monitoring device, the expansion body is made of non-elastic material.

[0012] As an optional solution of the above-mentioned groundwater level monitoring device, the top end of the expansion body is higher than the soil to be measured.

[0013] As an optional solution of the above-mentioned groundwater level monitoring device, the expansion body is made of degradable material.

[0014] As an optional solution of the above-mentioned groundwater level monitoring device, a clay ball is provided between the expansion body and the inner wall of the monitoring hole.

[0015] As an optional solution of the above-mentioned groundwater level monitoring device, before the expansion body is inflated, a plurality of spaced-apart cable ties are provided on the outer side of the expansion body, and the cable ties can be forced to break when the expansion body is inflated.

[0016] Another object of the present invention is to provide a construction method for groundwater level monitoring, which can prevent hydraulic connection between different underground aquifers and make the data of groundwater level monitoring more accurate.

[0017] To achieve this object, the present invention adopts the following technical solutions:

[0018] A construction method for groundwater level monitoring, using the groundwater level monitoring device as described above, comprising:

[0019] Processing the monitoring hole on the soil to be tested;

[0020] Extending the expansion body into the monitoring hole and connecting the expansion body to the air pump;

[0021] Inflating the expansion body until it is in sealing contact with the inner wall of the monitoring hole;

[0022] The water level gauge is extended into the monitoring channel to measure the water level in the monitoring hole.

[0023] As an optional solution to the above-mentioned construction method for monitoring the groundwater level, before the expansion body is extended into the monitoring hole, a clay ball is adhered to the periphery of the expansion body.

[0024] As an optional solution to the above-mentioned construction method of groundwater level monitoring, before machining the monitoring hole, the diameter and depth of the monitoring hole and the length and expanded diameter of the expansion body are designed according to the actual location and design requirements of the project, and the amount of the clay balls is calculated.

[0025] Beneficial effects:

[0026] The groundwater level monitoring device proposed in the present invention, by setting the expansion body as an inflatable structure, has a small size before inflation and can be very easily placed in the monitoring hole. After inflation, the expansion body expands and gradually squeezes tightly against the soil around the monitoring hole to achieve a sealing fit effect, effectively preventing hydraulic connection between different aquifers, thereby improving the accuracy of water level monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the groundwater level monitoring device provided by the present invention installed on the soil to be measured;

[0028] Figure 2 This is a schematic diagram of the structure of the expansion body provided by the present invention after inflation;

[0029] Figure 3 This is a schematic structural diagram of the expansion body provided by the present invention before inflation;

[0030] Figure 4 It is a structural schematic diagram of the groundwater level monitoring device provided by the present invention.

[0031] In the picture:

[0032] 1. Expansion body; 2. Air pump; 3. Soil to be measured; 4. Water level gauge; 5. Monitoring instrument; 6. Monitoring channel; 7. Cable tie. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] When monitoring groundwater levels, monitoring holes are typically drilled in the soil to be measured and rigid PVC or steel pipes are inserted into the holes as a monitoring channel. Due to the relatively high rigidity of PVC or steel pipes, close contact between the pipe wall and the soil is difficult, which can easily lead to hydraulic connections between different aquifers and affect the accuracy of monitoring results. Using a relatively flexible pipe can help the pipe wall conform to the soil, but because monitoring holes are generally deep, it is difficult to insert a soft pipe into the bottom of the hole, making installation more difficult.

[0038] For this reason, Figure 1 As shown, this embodiment provides a groundwater level monitoring device, which replaces the rigid tube commonly used in the prior art by providing an expansion body 1. Specifically, the groundwater level monitoring device includes an expansion body 1, an air pump 2, and a water level gauge 4. The expansion body 1 can be placed in a monitoring hole on a soil body 3 to be measured. The air pump 2 can inflate the expansion body 1 so that the outer wall of the expansion body 1 after expansion is sealed and fitted with the inner wall of the monitoring hole. Figure 2 As shown, after the expansion body 1 is expanded, a monitoring channel 6 is formed along the depth direction of the monitoring hole, and the monitoring channel 6 is connected to the bottom of the monitoring hole. The water level gauge 4 can be inserted into the monitoring channel 6 to detect the water level in the monitoring hole. The expansion body 1 is a double-layer structure, and gas can be filled between the two layers. Figure 3 The figure shows the expansion body 1 before inflation. The expansion body 1 can be rolled into a cylindrical shape before inflation, which occupies a small volume and can be easily inserted into the monitoring hole. Figure 2The figure shows a schematic diagram of the expansion body 1 after inflation. After inflation, the expansion body 1 expands into an annular straight cylinder, and the center of the annular straight cylinder forms the above-mentioned monitoring channel 6. The monitoring channel 6 has openings at both ends. The lower opening is connected to the groundwater, and the upper opening is for the water level meter 4 to be inserted.

[0039] By setting the expansion body 1 as an inflatable structure, its size before inflation is small and it can be placed in the monitoring hole very easily. After inflation, the expansion body 1 expands and gradually squeezes tightly with the soil around the monitoring hole to achieve a sealing fit effect, effectively preventing hydraulic connection between different aquifers, thereby improving the accuracy of water level monitoring results.

[0040] Furthermore, the gas within the expansion body 1 can be released, causing it to shrink and separate from the inner wall of the monitoring hole. The air pump 2, which has both inflation and vacuum functions, can be used to release the gas within the expansion body 1. After monitoring is complete, the gas within the expansion body 1 is released, causing it to shrink, thereby facilitating its removal from the monitoring hole. This allows for recycling and reuse, avoiding waste and effectively reducing construction costs. Furthermore, the removal of the expansion body 1 does not affect subsequent soil construction, facilitating project progress.

[0041] Further, if Figure 1 As shown, the top of the expansion body 1 is elevated above the soil mass 3 to facilitate connection of the expansion body 1 to the air pump 2 and removal of the deflated expansion body 1 from the monitoring hole. In actual operation, the top of the expansion body 1 is at least one meter above the soil mass 3 to facilitate operations such as inflation, deflation, and removal of the expansion body 1.

[0042] Preferably, the expansion body 1 is made of non-elastic material. During the inflation process of the expansion body 1, the annular expansion body 1 can form a cavity inside due to the constraint of its own inner side material, that is, form a monitoring channel 6. The outer diameter of the expanded expansion body 1 is basically consistent with the aperture of the monitoring hole. By setting the expansion body 1 to be made of non-elastic material, it is convenient to design the size of the expansion body 1.

[0043] More preferably, the expansion body 1 is made of a degradable material, such as a corn starch polymer material. The corn starch polymer material has certain strength, water resistance and deformation ability. The expansion body 1 can automatically degrade after being discarded, which helps to reduce pollution to the environment.

[0044] Further, if Figure 3 As shown, before inflation, the expansion body 1 is provided with a plurality of spaced-apart cable ties 7 on its exterior. These cable ties 7 are designed to break when the expansion body 1 is inflated. The cable ties 7 prevent the expansion body 1 from unraveling before inflation, helping to maintain a relatively small diameter, thereby making it easier to insert the expansion body 1 into the monitoring hole. This also facilitates transportation and storage of the expansion body 1.

[0045] To further prevent hydraulic connection between different aquifers, a clay ball is placed between expansion body 1 and the inner wall of the monitoring hole. Before expansion body 1 is placed into the monitoring hole, the clay ball is adhered to the outside of expansion body 1. As expansion body 1 expands, the clay ball is gradually squeezed between expansion body 1 and the inner wall of the monitoring hole, helping to prevent hydraulic connection between different aquifers.

[0046] This embodiment further provides a construction method for groundwater level monitoring, using the groundwater level monitoring device as described above, comprising:

[0047] Processing monitoring holes on the soil body 3 to be tested;

[0048] Insert the expansion body 1 into the monitoring hole and connect the expansion body 1 to the air pump 2;

[0049] Inflate the expansion body 1 until it is in tight contact with the inner wall of the monitoring hole;

[0050] The water level gauge 4 is extended into the monitoring channel 6 to measure the water level in the monitoring hole.

[0051] Preferably, before the expansion body 1 is extended into the monitoring hole, a clay ball is adhered to the outer periphery of the expansion body 1 .

[0052] Furthermore, before machining the monitoring hole, the diameter and depth of the monitoring hole and the length and expanded diameter of the expansion body 1 are designed according to the actual location and design requirements of the project, and the amount of clay balls is calculated.

[0053] Preferably, the monitoring hole is drilled in the soil body 3 to be measured by a drilling rig. During the drilling process, the soil body is protected while the hole is being drilled to prevent the hole from collapsing.

[0054] Furthermore, after the expansion body 1 is inflated with air using the air pump 2, the expansion body 1 is left to stand for a period of time to observe whether the pressure inside the expansion body 1 changes. If the pressure inside the expansion body 1 decreases, the expansion body 1 is inflated again. Specifically, Figure 4 As shown, the air pump 2 is connected to a monitoring instrument 5 , which can be used to conveniently observe the changes in the air pressure in the expansion body 1 .

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A groundwater level monitoring device, characterized in that: include: An expansion body (1) and an air pump (2), wherein the expansion body (1) can be placed in a monitoring hole on a soil body (3) to be tested, and the air pump (2) can inflate the expansion body (1) so that the outer wall of the expansion body (1) after expansion is sealed and fitted with the inner wall of the monitoring hole, and a monitoring channel (6) is formed along the depth direction of the monitoring hole after the expansion body (1) is expanded, and the monitoring channel (6) is connected to the bottom of the monitoring hole; a water level gauge (4) configured to extend into the monitoring channel (6) to detect the water level in the monitoring hole; The expansion body (1) is made of non-elastic material; The expansion body (1) has a double-layer structure, and gas can be injected between the two layers.

2. The groundwater level monitoring device according to claim 1, characterized in that: The gas in the expansion body (1) can be released, so that the expansion body (1) contracts and separates from the inner wall of the monitoring hole.

3. The groundwater level monitoring device according to claim 1, characterized in that: The top end of the expansion body (1) is higher than the soil body (3) to be measured.

4. The underground water level monitoring device according to claim 1, characterized in that: The expansion body (1) is made of degradable material.

5. The groundwater level monitoring device according to claim 1, characterized in that: A clay ball is provided between the expansion body (1) and the inner wall of the monitoring hole.

6. The underground water level monitoring device according to claim 1, characterized in that: Before the expansion body (1) is inflated, a plurality of spaced-apart cable ties (7) are provided on the outside of the expansion body (1), and when the expansion body (1) is inflated, the cable ties (7) can be forced to break.

7. A construction method for groundwater level monitoring, characterized in that: The groundwater level monitoring device according to any one of claims 1 to 6 comprises: Processing the monitoring hole on the soil body (3) to be tested; Extending the expansion body (1) into the monitoring hole, and connecting the expansion body (1) to the air pump (2); Inflating the expansion body (1) until it is in sealing contact with the inner wall of the monitoring hole; The water level gauge (4) is extended into the monitoring channel (6) to measure the water level in the monitoring hole.

8. The construction method for groundwater level monitoring according to claim 7, characterized in that: Before the expansion body (1) extends into the monitoring hole, a clay ball is adhered to the outer periphery of the expansion body (1).

9. The construction method for groundwater level monitoring according to claim 8, characterized in that: Before machining the monitoring hole, the diameter and depth of the monitoring hole and the length and expansion diameter of the expansion body (1) are designed according to the actual location and design requirements of the project, and the amount of the clay ball is calculated.

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